Download Newton`s Second Law Questions

Newton’s Second Law Questions
Name:
1. What is Newton’s Second Law of Motion?
2. Space shuttle astronauts experience accelerations of 35.0 m/s2 during takeoff. What force does a
75.0 kg astronaut experience during this acceleration?
3. Two perpendicular forces, one of 45.0 N directed upward and the second of 60.0 N directed to the
right, act simultaneously on an object with a mass of 35.0 kg. What is the acceleration of the
object?
4. There are three forces acting upon an object: 30 N north, 50 N west, and a 25 N force acting 35o
north of east. The mass of the object is 15.0 kg. What is the object’s acceleration?
5. An elevator with a mass of 2000 kg is supported by a steel cable. What is the tension in the cable
when the elevator is accelerated upward at a rate of 0.30 m/s2?
6. A 4.46 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force of
12.9 N at an angle of 26.5o above the horizontal. What is the acceleration of the block when the
force is applied?
7. A mass of 1.41 kg is suspended from a string and accelerates upwards at 3.30 m/s2. Calculate the
tension in the string.
8. A hockey puck, with a mass of 0.250 kg, is hit and given an initial velocity of 20.0 m/s. The ice
exerts a frictional force on the puck and slows it down to stop in 16.0 s.
a. What is the acceleration of the puck?
b. What is the net force acting on the puck?
9. A 5.0 kg block is being pulled upward with a force of 75.0 N, gravity is still acting downward.
What is the acceleration of the object?
10. A 1500 kg race car is decelerating from 45.0 m/s to a stop in 30.0 s.
a. What is the acceleration of the car?
b. What net force was acting on the car?